liteusb: make oe_n optional on ft2232h phy

diff --git a/misoclib/com/liteusb/phy/ft2232h.py b/misoclib/com/liteusb/phy/ft2232h.py
index 6f5461b0adfaa923450e8187aae081924ebd5790..05b9cedd100bd4db4487e548552a91f09ba07ffd 100644 (file)
--- a/misoclib/com/liteusb/phy/ft2232h.py
+++ b/misoclib/com/liteusb/phy/ft2232h.py
@@ -3,7 +3,7 @@ from migen.flow.actor import *
 from migen.actorlib.fifo import AsyncFIFO
 from migen.fhdl.specials import *
 
-from liteusb.ftdi.std import *
+from misoclib.com.liteusb.common import *
 
 class FtdiPHY(Module):
        def __init__(self, pads, fifo_depth=32, read_time=16, write_time=16):
@@ -100,7 +100,12 @@ class FtdiPHY(Module):
                data_r  = Signal(dw)
                data_oe = Signal()
 
-               pads.oe_n.reset = 1
+               if hasattr(pads, "oe_n"):
+                       pads_oe_n = pads.oe_n
+               else:
+                       pads_oe_n = Signal()
+
+               pads_oe_n.reset = 1
                pads.rd_n.reset = 1
                pads.wr_n.reset = 1
 
@@ -108,14 +113,14 @@ class FtdiPHY(Module):
                        If(fsm.ongoing("READ"),
                                data_oe.eq(0),
 
-                               pads.oe_n.eq(0),
+                               pads_oe_n.eq(0),
                                pads.rd_n.eq(~wants_read),
                                pads.wr_n.eq(1)
 
                        ).Elif(fsm.ongoing("WRITE"),
                                data_oe.eq(1),
 
-                               pads.oe_n.eq(1),
+                               pads_oe_n.eq(1),
                                pads.rd_n.eq(1),
                                pads.wr_n.eq(~wants_write),
 
@@ -124,7 +129,7 @@ class FtdiPHY(Module):
                        ).Else(
                                data_oe.eq(1),
 
-                               pads.oe_n.eq(~fsm.ongoing("WTR")),
+                               pads_oe_n.eq(~fsm.ongoing("WTR")),
                                pads.rd_n.eq(1),
                                pads.wr_n.eq(1)
                        ),